Modeling lateral geniculate nucleus response with contrast gain control. Part 2: Analysis

Davis Cope, Barbara Blakeslee, Mark E. McCourt

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Cope et al. [J. Opt. Soc. Am. A 30, 2401 (2013)] proposed a class of models for lateral geniculate nucleus (LGN) ON-cell behavior consisting of a linear response with divisive normalization by local stimulus contrast. Here, we analyze a specific model with the linear response defined by a difference-of-Gaussians filter, and a circular Gaussian for the gain pool weighting function. For sinusoidal grating stimuli, the parameter region for bandpass behavior of the linear response is determined, and the gain control response is shown to act as a switch (changing from "off" to "on" with increasing spatial frequency). It is also shown that large gain pools stabilize the optimal spatial frequency of the total nonlinear response at a fixed value independent of contrast and stimulus magnitude. Under- and super-saturation, as well as contrast saturation, occur as typical effects of stimulus magnitude. For circular spot stimuli, it is shown that large gain pools stabilize the spot size that yields the maximum response.

Original languageEnglish (US)
Pages (from-to)348-362
Number of pages15
JournalJournal of the Optical Society of America A: Optics and Image Science, and Vision
Volume31
Issue number2
DOIs
StatePublished - Feb 1 2014

Fingerprint

Geniculate Bodies
Gain control
Linear Models
stimuli
Saturation (materials composition)
nuclei
Supersaturation
Switches
weighting functions
supersaturation
switches
gratings
saturation
filters
cells

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Computer Vision and Pattern Recognition
  • Medicine(all)

Cite this

Modeling lateral geniculate nucleus response with contrast gain control. Part 2 : Analysis. / Cope, Davis; Blakeslee, Barbara; McCourt, Mark E.

In: Journal of the Optical Society of America A: Optics and Image Science, and Vision, Vol. 31, No. 2, 01.02.2014, p. 348-362.

Research output: Contribution to journalArticle

@article{093f4c4e6a9e441698a12cf2eda3cb0d,
title = "Modeling lateral geniculate nucleus response with contrast gain control. Part 2: Analysis",
abstract = "Cope et al. [J. Opt. Soc. Am. A 30, 2401 (2013)] proposed a class of models for lateral geniculate nucleus (LGN) ON-cell behavior consisting of a linear response with divisive normalization by local stimulus contrast. Here, we analyze a specific model with the linear response defined by a difference-of-Gaussians filter, and a circular Gaussian for the gain pool weighting function. For sinusoidal grating stimuli, the parameter region for bandpass behavior of the linear response is determined, and the gain control response is shown to act as a switch (changing from {"}off{"} to {"}on{"} with increasing spatial frequency). It is also shown that large gain pools stabilize the optimal spatial frequency of the total nonlinear response at a fixed value independent of contrast and stimulus magnitude. Under- and super-saturation, as well as contrast saturation, occur as typical effects of stimulus magnitude. For circular spot stimuli, it is shown that large gain pools stabilize the spot size that yields the maximum response.",
author = "Davis Cope and Barbara Blakeslee and McCourt, {Mark E.}",
year = "2014",
month = "2",
day = "1",
doi = "10.1364/JOSAA.31.000348",
language = "English (US)",
volume = "31",
pages = "348--362",
journal = "Journal of the Optical Society of America A: Optics and Image Science, and Vision",
issn = "1084-7529",
number = "2",

}

TY - JOUR

T1 - Modeling lateral geniculate nucleus response with contrast gain control. Part 2

T2 - Analysis

AU - Cope, Davis

AU - Blakeslee, Barbara

AU - McCourt, Mark E.

PY - 2014/2/1

Y1 - 2014/2/1

N2 - Cope et al. [J. Opt. Soc. Am. A 30, 2401 (2013)] proposed a class of models for lateral geniculate nucleus (LGN) ON-cell behavior consisting of a linear response with divisive normalization by local stimulus contrast. Here, we analyze a specific model with the linear response defined by a difference-of-Gaussians filter, and a circular Gaussian for the gain pool weighting function. For sinusoidal grating stimuli, the parameter region for bandpass behavior of the linear response is determined, and the gain control response is shown to act as a switch (changing from "off" to "on" with increasing spatial frequency). It is also shown that large gain pools stabilize the optimal spatial frequency of the total nonlinear response at a fixed value independent of contrast and stimulus magnitude. Under- and super-saturation, as well as contrast saturation, occur as typical effects of stimulus magnitude. For circular spot stimuli, it is shown that large gain pools stabilize the spot size that yields the maximum response.

AB - Cope et al. [J. Opt. Soc. Am. A 30, 2401 (2013)] proposed a class of models for lateral geniculate nucleus (LGN) ON-cell behavior consisting of a linear response with divisive normalization by local stimulus contrast. Here, we analyze a specific model with the linear response defined by a difference-of-Gaussians filter, and a circular Gaussian for the gain pool weighting function. For sinusoidal grating stimuli, the parameter region for bandpass behavior of the linear response is determined, and the gain control response is shown to act as a switch (changing from "off" to "on" with increasing spatial frequency). It is also shown that large gain pools stabilize the optimal spatial frequency of the total nonlinear response at a fixed value independent of contrast and stimulus magnitude. Under- and super-saturation, as well as contrast saturation, occur as typical effects of stimulus magnitude. For circular spot stimuli, it is shown that large gain pools stabilize the spot size that yields the maximum response.

UR - http://www.scopus.com/inward/record.url?scp=84898067476&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84898067476&partnerID=8YFLogxK

U2 - 10.1364/JOSAA.31.000348

DO - 10.1364/JOSAA.31.000348

M3 - Article

C2 - 24562034

AN - SCOPUS:84898067476

VL - 31

SP - 348

EP - 362

JO - Journal of the Optical Society of America A: Optics and Image Science, and Vision

JF - Journal of the Optical Society of America A: Optics and Image Science, and Vision

SN - 1084-7529

IS - 2

ER -